Lazy-tongs elevator.



No; 862,639. PATENTED AUG. 6, 1907.

, A. ERIS.

LAZY TO s ELEVATOR.

ABPL IIIIIIIIIIIII 0'1.l8, 1905.

2 SHEETS-SHEET 1.

PATENTED AUG. 6

A. JEFFERIS. LAZY TONGS ELEVATOR.

APPLICATION FILED 00T.18. 1905.

2 SHEETS-SHEET 2.

flullllljwu, 1,4

'ent in said sections.

' UNITED STATES PATENT onnron.

AMBROSE JEFFE'RIS, OF EAST ST. LOUIS, ILLINOIS LAZY-TONGS ELEV TOR.

To all whom it mag concern:

Be it known that I, AMBROSE JErrERIs, a citizen of the United States,residing in East St. Louis, in the county of St. Clair and State ofIllinois, have invented certain new and useful Improvements inLazy-Tongs Elevators, ofwhich the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification. My invention relates to an elevatorconstructed upon the lazy tongs principle and of such naturerthat it maybe used as a ladder for hoisting men or material of any kind; also as afire escape,'a-derrick or for utility as a hoisting or loweringapparatus of any nature to which the construction may beapplicable.

Figure I; is a side elevation of my elevator in partially raisedcondition. Fig. II is a front or rear elevation of my elevator in theposition seenin Fig. I. Fig. III is an enlarged "side elevation of theelevator in collapsed or lowered condition. Fig. IV is an enlargedhorizontal section taken on line IV-IV, Fig.

III. Fig. V is a front or rear elevation of the upper portion'of theelevator in the condition seen in Fig. III. Fig. VI is a perspectiveview of the rock shafts by which the main section of the elevator issupported and the means by which the guy sections of the elevator areheld in set positions.

1 designatcs'the base frame of my elevator which may be of any desirableconstruction and maybe mounted in a stationary position or supportedupon a carriage to provide for portability of the elevator.

2 designates the main lazy-tongs sections which con sist of a pluralityof levers of any desirable number and size pivoted together in themanner common to the well known lazy-tongs. The lower levers of the mainsections 2 are rockingly fitted to a support to be hereinafter named inorder that said levers may move to and fro when the sections areextended or folded to provide for the upward movementof the elevator forthe folding thereoff The main sections are united to each other byrungsor connecting rods 8 loosely fitted in the mating ends of the leversthroughout the sections. One of the lower levers of each main sectionhas connected to it apull rope 4, and mounted in the opposite lover ofeach main section is a winch shaft 5 around which the pull ropes 4corresponding to the two main sections are wound in order that when saidwinch shaft is rotated the pull ropes may be wrapped around the winchshaft to draw the lower main section levers toward each other for thepurpose of elongating the main sections and raising the upper end of thesections to any desired elevation limited only by the number-of andlengths of the levers pres- The winch shaft has fixed to it spur wheels6 to which rotation is imparted by Specification of Letters Patent. IApplication filed October 18,1905. Serial No. 283,345.

Patented Aug. 6, 190 7.

cranks 7 associated with pinions 8, the latter of which mesh with thespur wheels 6. Retrograde rotation of the spur wheels, and consequentlyof the winch shaft, is prevented by a dog 9.

10 designates a pair of uprights loosely fitted to one of the upperrungs connectingv the main sections. of the elevator and .11 is aplatform supported by said uprights on whicha person may stand or sit orany other object to be elevated may be placed.

12 are ,pull ropes which are connected to the topmost levers of the mainsections 2 preferably by securirTg said ropes to rods 2 joining thetopmost levers. One of these pull ropes is Wound in one direction andthe other in a re'vcrse direction around a winch shaft 13 journaled inthe uprights 10, whereby, upon the rotation of said wir 5h shaft,thertopmost main section levers may be'drawn' toward each other for thepur- 1 pose of elongating the main sections of the elevator. Thewinch'shaft 13 has fixed to it a spur wheel 14, and arranged in meshwith said spur wheel is a pinion 15 carried by a shaft 16 journaled inthe upright 10. The shaft 16 is adapted to rccciv e a crank handle 17 bywhich said rod may be turned to impart rotation to the winch shaft 13.for the purpose of exerting the desired pull upon the pull ropes 12.

1 8 designates guys of lazy-tongs construction, there being two ofsaidguys forcach of the main sections2 of the elevator to stay said mainsections from toppling movement; The uppermost levers of the guys 18 arepivotally connected to levers of themain sections of the elevatoradjacent to the upper ends of said sections for the purpose of providingfor corresponding movement of the main sections and guys. One ofthe'lower levers of each guy 18 is pivoted at 19 to the base frame 1,see Figs. 1' and III, while the lever mating with each particular levermentioned has connected to it a link 20. The links 20 are united toactuating mechanism to be presently described for the purpose, not onlyfor elongating the lazy-tongs guys 18, but for holding them in theirelongated conditions.

21 designates a rotatable shaft journaled in suitable bearing boxes onthe base frame 1 and 22 is a rotatable hollow shaft loosely fitted tothe shaft 21 to turn thereon. These shafts serve as supports for themain elevator sections 2 which are loosely supported thereon, beingpreferably fitted to the hollow shaft 22. The shaft 21 has fixed to it acrank arm 23 and a lever 24 to which the links 20 connected to one ofthe guys 18 are pivoted and the shaft 22 has fixed to ita crank arm 23and a lever 24- to which the links 20 connected to the other guy 18 arepivoted. By this means either of the guys may be acted upon to elongateit independent of the other guy by the operator grasping the properlever and imparting movement thereto for the purpose of moving the links20 corresponding to the guy to be i elongated. Each of the levers 2A isprovided with a l pawl 25 and a. grip lever 26 for actuating said pawl.

27 are rack segments with which the pawls of the lever 2i are adapted toengage iorthe pui'pose ofholdin g the levers from movement when the guyshave been elongated to the desired extent incorrcspondencerto theelongation of the main elevator sections 2, thereby providing for thelocking otthe guys in their set positions.

28 designates a swinging platform that is supported by one of the mainelevator sections 2 and is adapted to be placed in horizontal position,as seen in Fig. II, to

' restiupon a window sill or any other desirable support at the locationto which said platform is raised when the elevator is in its upliftedcondition for service.- -The platform 28 is connectedto the rung 3uniting the main sections 2 by a swing bracket 29 loosely fitted to saidrung and pivoted at .30 to the platform. By this arrangement theplatform 28 may be oscillated to bring it into a horizontal position sothat it will rest upon a window sill or other support and that the saidplatform may also be elevated into a folded condition against the sideof the main seetions 'of the elevator when not in 2 use. At the free endof the platform are arms 3]. that are adapted to engage the window sillor other support on which the platform may depend for its support inaddition to its connection to the elevator. isa pulley carried by aniron bracket supported on the plat- Q form 28 which is provided with aslot (see 32 in Fig. III) through which the rope ispassed for thepnrpose'of hoisting or lowering any object that may be attached to therope. I

For the-purpose of facilitating the upward movement 35 of the mainelevator sections 2 I make 'use of springs that will assist in theactuation of the levers of said sections. 33 are U-shaped springs havingcoilsjntcr'mcdiate of their ends and each having an arm secured to oneof the base frame members and an arm secured to 40 one of the levers atthe lower end of each elevator main section. 34 is an L spring havingits coil surrounding the rung 3 of the main elevator sections and havingarins'that. are attached to the adjacent levers of the main sections. Asseen most clearly in Fig. IV, similar springs are mountedfupon each ofthe pivots holding the several sections. .The springs 33 and 34 areconstantly under 1 tension and when the elevator is to be raised thesprings act against the various lovers of the main sections, therebyassisting in elongating saidsections.

The operation of theelevator is now evident. The

article to be hoisted is placed upon platform 11 in its lower positionand pawls 25 disengaged from the segmental rack 27, to permit guys 18 tobe drawn out asthe platform moves upward. 'Thc crank handles 7 on eitherside of the machine are then manned and the rope 4 caused to wind uponspindle 5 by means of winch gears 6 and 8. As the ends of crossinglovers are thus drawn together, the platform, is elevated as alreadypointed out until it reaches its upper position when by manipulation oflevers 24,-thelazy-tongs guys 18 are drawn taut and held so by therelease ofpawls 25.

Side platform 28 may now he dropped andthe load removed.-

Should it be desired to make use of pulley -32 for ordinary hoistingpurposes, it would be of course necessary to raise the side' platform toa point above where it is desired to deposit goods in which caseprojecting seats may be provided for arms 31 or platform 28 may be usedas the jib of a crane." As is evident from Figs. I

and II of the drawings, lower crank drive 7 and upper crank-drive 17 maybe used inconjunction so as to mutually reinforce one another.

I claim as my invention:

1. In an elevator having sections 'oif lazy-tongs form;

the combination of a main rectangular hose, :1 pair of main centralsections of lazy-tongs form carried thereon, a guy of may-tongs formmounted eaehcornerof the rectangular frame and attached at its outer endto the main central sections, and means for actuating said guy sectionsinde nation of a pair of main sections of lazy-tongs form.

means for elongating said sections. guys connectedfto said sections.links connected to said guys, levers having connection with said links,and racks for holding said levers from movement, substantially as setforth.

AMBROSE .inninms.

in presence of Iinaxenn iIonaN,

\\'.\i. H. Scorn.

